[ncl-talk] How can I plot QNICE in WRF output file?

[Barry Lynn]

Hi:

Within your ncl program, you can do print(fin), where
fin = addfile(filename,"r")

filename is the name of your wrf output file.

On Wed, Apr 18, 2018 at 6:45 PM, Bill Ladwig <ladwig at ucar.edu> wrote:

> Hi Fangda,
>
> The first step is to look at your data. Are you sure QNICE is a variable
> in your WRF output file? Don't assume. Use the 'ncdump -h your_wrf_file'
> command or ncl_filedump (https://www.ncl.ucar.edu/
> Document/Tools/ncl_filedump.shtml) to look at the contents of your WRF
> file. If you don't see QNICE in there, you won't be able to read it. The
> absence or presence of variables in the output file is determined by your
> WRF configuration and also how you have your registry set up. I don't
> remember QNICE being one that is written out by default, so you might need
> to modify the registry, rebuild, and re-run if it's not there.
>
> Hope this helps,
>
> Bill
>
> On Wed, Apr 18, 2018 at 7:49 AM, Fangda <tengfangda at gmail.com> wrote:
>
>> Hello Everyone
>>
>> When I use wrf_user_getvar function to deal with Ice Number concentration
>> in wrfout files, I get this message:
>>
>> fatal:No valid instance of variable QNICE found in file list
>>> fatal:["Execute.c":8640]:Execute: Error occurred at or near line 662 in
>>> file /usr/local/ncl6.4.0/lib/ncarg/nclscripts/wrf/WRFUserARW.ncl
>>> fatal:["Execute.c":8640]:Execute: Error occurred at or near line 1716
>>> in file /usr/local/ncl6.4.0/lib/ncarg/nclscripts/wrf/WRFUserARW.ncl
>>
>>
>> Does it mean I cann't read QNICE using this function? How can I read
>> QNICE in WRF output file with ncl?
>>
>> I appreciate your help, thanks.
>>
>> Fangda
>>
>>
>>
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-- 
Barry H. Lynn, Ph.D
Senior Lecturer,
The Institute of the Earth Science,
The Hebrew University of Jerusalem,
Givat Ram, Jerusalem 91904, Israel
Tel: 972 547 231 170
Fax: (972)-25662581

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